A friend of mine has a 440. It falls falt at 5500. Background, .030 over 9:1 ish (.070 in the hole pistons), OTB E-heads (84cc), Fel-Pro's, 513 VooDoo cam, TTi headers (and 2.5 X-pipe exhaust), RPM intake Demon carb. He has swaped boxes, coils, distribs, cap/rotor carbs, fuel lines, pumps, went w/ roller rockers, swaped valve springs, you name it. It just will not pull above 5500 and is laying down a ton at the top end. Could the E-heads be causing the problems? He has a set of nice 906's he might try. If you need more info it's a 69 RR 727, 175k convert and 3.55's. So far the best he can do is 13.0 @100mph falling off.
He runs thru the pipes...could that be a problem??
Any ideas?